Wrench.



L. R. BLAOKMORE.

WRENCH. 7 APPLICATION FILED AUG. 12, 1908.

923, 17, Patented June 1,1909.

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WITNESSES ATTORNEYS L. R. BLAOKMORE.

WRENCH.

APPLICATION mum AUG. 12,1908

Patented June 1, 1909.

2 SHEETS-SHEET 2.

liiiiiiiil'aiil M N J mm m N 6 N f w H WITNESSES ATTOHNEYS- with a transverse slot A which preferably of the handle being broken away.

liNliTE LAWRENFE R. BLM' KMORE, OF ARLINGTON, NEW JERSEY.

' wnnn'on.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed August 12, 1908. Serial No. 448,254.

To all whom it may concern:

the direction of length of the wrench bar and Be it known that I, LAWRENCE R. BLACK- receives a cross pin E which holds the sliding MORE, a citizen of the United States, resid ng JELW F to the shank A and yet perm ts the at Arlington, in the county of Hudson and State of New Jersey, have invented an Improvement in Wrenches, of which the following is a specification.

This invention is an improvement in wrenches, particularly in pipe wrenches, and consists in certain novel constructions and combination of parts as will be hereinafter described and claimed.

In the drawings Figure is a side elcvation, and Fig. 2 is a top plan view of a wrench embodying my invention, a portion of the handle being broken away in both figures. Figs. 3 and 4 are respectively side and edge views of the wrench bar, a portion Fig. 5 is a side view, and Fig. 6 an end view of the rocking aw. Fig. 7 is a side view, and Fig. 8 an end view of the sliding jaw.

Wrench frame. Fi 1.1 is a side view )artially broken away, of a wrench in whichthet jaw on the adjusting bar is fixed instead of rocking, as shown in Fig. 1. Fig. 12 is an edge view, and Fig; 13 a side view partly broken away of the adjusting bar shown in Fig. 11, and Fig. 1 1 is a detail cross section on about line Me t i of Fig.

The wrench as shown, comprises a wrench bar A having a handle portion A, and what. for convenience of reference I term a head A the latter projecting beyond a shoulder A which forms a stop for the wrench frame B when applied to the head A, as shown in Fig. 1.

The longitudinal frame B is shown in do. tail in Figs. 9 and 10, andhas upper and lower longitudinal openings B and B, the latter fitting 'over the head A of the wrench bar A. The upper opening B is above the wrench bar and receives the shank of the adjusting bar (7.

The longitudinal opening B is intersected by a transverse opening B to lighten the frame, and the opening 13 intersected by the transverse openings B which receiye the serrated nut D which screws upon the threaded portion C of the ad usting bar and o crates to adjust the bar (I to the size of t io ipe or other object to be turned.

ear its extremity, the head A? is provided inclines slightly to a line at a right angle to Fig. 5) is side view, and Flg. '10 an end view of the said jaw to slide between the positions shown in full and dotted lines in Fig. 1. This jaw F has a serrated face F, the body portion F" which abuts the end of the head A the latter being inclined, as shown. in Fig. 3, and the aw F also has the rearwardly projecting lug." F 3 which lap on opposite sides of the front end of the head A as will be understood from Figs. 1, 2 and 8 of the drawingsu" The front end of the frarr e B is conformed at its lower portion at B F of the jaw F pod at its upper portion is curved at B tgr conform to the curved face F on the lugs" F ofthe jaw F.

It will be notioed that the upper portion of the front end of the frame B extends at B to the ,end of the head A and operates as a leinfei cement to the back bearing of the upperrportion of thej aw F when the latter is in the full line position, shown in Figs. 1 and 11 ,of the drawings. "By the described construction, it will be noticed that the frame B is held upon the head A by the pin E which also operates to secure the sliding jaw movably to the head A of the wrench bar so that. the parts may be readily assembled and, they. may be conveniently taken apart whenever desired simply by the application and removal of the pin E. This construction of the wrench bar with the removable frame carrying the adjusting bar is also important, in that it provides for making the different parts of any suitable in ctal and for restoring any parts when worn, without necessitating the replacing of all the parts of the wrench.

The adjusting bar has a jaw portion C depending in front of the jaw F'and provided with a serrated jaw face. This serrated jaw face may be a fixed part G, as shown in Figs. 11 and 12, or the serrated jaw G may be supported to slide in connection with the jaw portion C of the adjusting bar as shown in Figs. .1 and 14. In this construction, the jaw (3 whose serrated face 0. poses the serrated face of the jaw F is provir ed on its inner side with a rib (i which rocks in a'reeosslfii' in the jaw portion of the adjusting bar C and is held thereto by a cross pin G as will be understood from Figs. 1 and 14 of the drawing.

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